[new feature] add i18n support (#310)

* fix: Tabbar icon line-height

* [new feature] progress add showPivot prop

* [new feature] TabItem support vue-router

* [new feature] update document header style

* [Doc] add toast english ducoment

* [new feature] add i18n support

* feat: Extract demos from markdown

* feat: Base components demos

* [new feature] complete demo extract & translate

* [fix] text cases

* fix: add deepAssign test cases

* fix: changelog detail

* [new feature] AddressEdit support i18n

packages/contact-list/index.vue

@@ -4,14 +4,14 @@
       <van-cell-group>
         <van-cell v-for="(item, index) in list" :key="item.id">
           <van-radio :name="item.id" @click="$emit('select', item, index)">
-            <p class="van-contact-list__text">联系人：{{ item.name }}</p>
-            <p class="van-contact-list__text">联系电话：{{ item.tel }}</p>
+            <p class="van-contact-list__text">{{ $t('name') }}：{{ item.name }}</p>
+            <p class="van-contact-list__text">{{ $t('tel') }}：{{ item.tel }}</p>
           </van-radio>
           <van-icon name="edit" class="van-contact-list__edit" @click="$emit('edit', item, index)" />
         </van-cell>
       </van-cell-group>
     </van-radio-group>
-    <van-cell icon="add" class="van-contact-list__add van-hairline--top" @click="$emit('add')" :title="addText" isLink />
+    <van-cell icon="add" class="van-contact-list__add van-hairline--top" @click="$emit('add')" :title="addText || $t('addText')" isLink />
   </div>
 </template>
 
@@ -21,10 +21,13 @@ import Cell from '../cell';
 import Radio from '../radio';
 import CellGroup from '../cell-group';
 import RadioGroup from '../radio-group';
+import { i18n } from '../locale';
 
 export default {
   name: 'van-contact-list',
 
+  mixins: [i18n],
+
   components: {
     [Icon.name]: Icon,
     [Cell.name]: Cell,
@@ -35,10 +38,7 @@ export default {
 
   props: {
     value: {},
-    addText: {
-      type: String,
-      default: '新建联系人'
-    },
+    addText: String,
     list: {
       type: Array,
       default: () => []